Annals of Biomedical Engineering

, Volume 41, Issue 1, pp 131–141 | Cite as

Energy Harvesting from the Beating Heart by a Mass Imbalance Oscillation Generator

  • A. Zurbuchen
  • A. Pfenniger
  • A. Stahel
  • C. T. Stoeck
  • S. Vandenberghe
  • V. M. Koch
  • Rolf Vogel
Article

Abstract

Energy-harvesting devices attract wide interest as power supplies of today’s medical implants. Their long lifetime will spare patients from repeated surgical interventions. They also offer the opportunity to further miniaturize existing implants such as pacemakers, defibrillators or recorders of bio signals. A mass imbalance oscillation generator, which consists of a clockwork from a commercially available automatic wrist watch, was used as energy harvesting device to convert the kinetic energy from the cardiac wall motion to electrical energy. An MRI-based motion analysis of the left ventricle revealed basal regions to be energetically most favorable for the rotating unbalance of our harvester. A mathematical model was developed as a tool for optimizing the device’s configuration. The model was validated by an in vitro experiment where an arm robot accelerated the harvesting device by reproducing the cardiac motion. Furthermore, in an in vivo experiment, the device was affixed onto a sheep heart for 1 h. The generated power in both experiments—in vitro (30 μW) and in vivo (16.7 μW)—is sufficient to power modern pacemakers.

Keywords

Scavenging Automatic power-generating system Power supplies Cardiac wall motion MRI Unbalance Wrist watch 

Notes

Acknowledgments

The authors would like to thank the School of Life Sciences at the University of Applied Sciences Northwestern Switzerland and the Bern University Hospital for facilitating the in vitro and in vivo experiment, respectively. The research was supported by the Department of Cardiology at the Bern University Hospital and the Commission for Technology and Innovation (KTI-CTI 12589.1 PFLS-LS).

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Copyright information

© Biomedical Engineering Society 2012

Authors and Affiliations

  • A. Zurbuchen
    • 1
  • A. Pfenniger
    • 1
    • 4
  • A. Stahel
    • 4
  • C. T. Stoeck
    • 3
  • S. Vandenberghe
    • 1
  • V. M. Koch
    • 4
  • Rolf Vogel
    • 1
    • 2
    • 5
  1. 1.ARTORG Center for Biomedical Engineering ResearchUniversity of BernBernSwitzerland
  2. 2.Department of CardiologySolothurner SpitälerSolothurnSwitzerland
  3. 3.Institute for Biomedical EngineeringUniversity and ETH ZurichZurichSwitzerland
  4. 4.Engineering and Information TechnologyBern University of Applied SciencesBielSwitzerland
  5. 5.Department of CardiologyBern University HospitalBernSwitzerland

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